Effect of multistage lamellar microstructure on mechanical properties of Tc18 alloy
In this study, a three-step heat treatment approach, which included annealing, solution treatment at 740–820 °C, and aging at 450–550 °C, was employed to control the precipitation behavior of the α phase in TC18(Ti-5Al-5Mo-5 V-1Cr-1Fe) alloy. The multistage microstructure resulting was found to cont...
Gespeichert in:
Veröffentlicht in: | Materials today communications 2024-03, Vol.38, p.107732, Article 107732 |
---|---|
Hauptverfasser: | , , , , , , |
Format: | Artikel |
Sprache: | eng |
Schlagworte: | |
Online-Zugang: | Volltext |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
Zusammenfassung: | In this study, a three-step heat treatment approach, which included annealing, solution treatment at 740–820 °C, and aging at 450–550 °C, was employed to control the precipitation behavior of the α phase in TC18(Ti-5Al-5Mo-5 V-1Cr-1Fe) alloy. The multistage microstructure resulting was found to contain both the primary lamellar structure (α) and the secondary lamellar structure (αs), and the relationship between the spacing of multi-level lamellar microstructure and the mechanical properties of the alloy was effeciently determined. The study demonstrates that lowering the solid solution temperature reduces the interlayer spacing of the primary α phase, and increasing the aging temperature enlarges the interlayer spacing of the secondary αs phase, thereby enhancing the material's mechanical performance. Nevertheless, a substantial discrepancy in yield strength exists between these two interlayer spacings, which impacts the stress-strain coordination and reduces the plastic zone at the crack tip, and also increases the likelihood of formation of microvoids and microcracks at grain boundaries.
[Display omitted] |
---|---|
ISSN: | 2352-4928 2352-4928 |
DOI: | 10.1016/j.mtcomm.2023.107732 |